Siemens siprotec 7SD5 User Manual page 440

2 Functions
Figure 2-189 Standard interlockings
1) Source of Command REMOTE includes LOCAL.
LOCAL Command using substation controller
REMOTE Command via telecontrol station to power system management and from power system management to the
device
The display shows the configured interlocking reasons. The are marked by letters ex-
plained in Table 2-25.
Table 2-25
Figure 2-190 shows all interlocking conditions (which usually appear in the display of
the device) for three switchgear items with the relevant abbreviations explained in
Table 2-25. All parametrized interlocking conditions are shown.
440
Interlocking Commands
Interlocking Commands
Switching Authority
System Interlocking
Bay Interlocking
SET = ACTUAL (switch direction check)
Protection Blockage
Command Display
L
S
Z
P
B
C53000-G1176-C169-1
L
S
Z
P
B
7SD5 Manual